"The airdrop was a test of the newest weapon against one of the island’s most stubborn enemies — the invasive brown tree snake." "Each mouse was attached to two squares of cardboard and a streamer of green paper. The streamer could be dropped from a low-flying helicopter and would catch in the upper tree branches of the jungle. About 200 of the baits and some radio transmitters were dropped from a helicopter on 20 acres of Naval Base Guam on Wednesday as a first test of the system, Vice said."